... spot welding machine output from 100WS to 18000WS. especially suit for welding purple copper, bronze, brass, aluminum, ag, stainless steel and so ... widely: It can melt 8MM stainless steel, aluminum, titanium, ag and so on color metals. overcome the difficult problems welding copper, ... low power. high power factors. compared the welding capacity to same force frequency machine. use power only1/7-1/10. ...